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|  MIL-T-52953C
4.4
Test.
4.4.1 Test conditions . Test shall be conducted at the ambient temperature
and climatic conditions existing at the place of test. Only that maintenance
established by the contractor and submitted as a maintenance schedule prior to
commencement of the test shall be performed during the test.
TABLE II. Test schedule.
First
Quality
Test
Requirement
Test
Article
Conformance
paragraph
paragraph
3.1.1, 3.6
4.3
First article truck inspection.
3.24.7,3.24.8,
4.4.3
X
Maximum fork height, collapsed
X
3.24.9
mast height, free lift height.
3.24.1, 3.24.2
4.4.4
X
Lifting speed, lowering speed.
X
3.24.3
4.4.5
Right angle turn.
X
3.24.4
4.4.6
X
Travel speed.
X
3.24.5
4.4.7
Slope ascension.
X
3.24.6
4.4.8
Tilt.
X
3.24.10
4.4.9
Stability.
X
3.24.11
4.4.10
Endurance reliability test.
X
3.20.3
4.7
Nuclear-biological-chemical
X
protection.
3.4
4.4.15
Slinging and Tiedown.
X
4.4.16
3.30
4.4.13
Noise level test.
X
3.8
4.4.11
Maintenance operations test.
X
3.17
4.4.12
Brakes.
X
3.24.13
4.4.20
Drift
X
3.31
4.4.14
Electromagnetic interface
X
4.4.2 Capacity load. During the test specified herein, a 48-inch cube of
the specified capacity load shall be used. Capacity load is defined as the
truck capacity required by the applicable specification sheet. The tolerances
for weight shall be plus 1 percent and minus 0 percent and for dimensions
shall be plus 1 percent and minus 0 percent.
4.4.3 Maximum fork height, collapsed mast height, free-lift height . With
capacity load on forks and mast in true vertical position measure and record
free lift height and maximum fork height. Measure and record collapsed mast
height with no load on the forks. Nonconformance to the applicable
specification sheet shall be cause for rejection.
4.4.4 Lifting speed and lowering speed . Record time in seconds required
to raise capacity load from floor to maximum fork height using timing device.
Measure and record distance in inches from floor to top surface of forks in
fully lowered position. Record the difference between maximum fork height and
the height of the forks in the lowered position. Record time in seconds to
lower unloaded forks from maximum height to fully lowered position. The
raising and lowering shall be performed three times. Noncoformance to 3.24.1
or 3.24.2 shall be cause for rejection.
19
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